The Harry Potter Universe belongs to J.K. Rowling. I'm just borrowing the characters for a while. This is for pleasure only, no profit is being made, and no copyright infringement is intended.
Molly and Arthur definitely had the Christmas Spirit. Christmas morning, they woke at first light to pull the stockings that they had filled for each other under the covers so they could still snuggle while they investigated them. They had a bit of a lie in before pulling on dressing gowns and eating a light breakfast. Molly sent the dishes over to the sink to wash themselves and climbed upstairs to shower and dress in her new green robes trimmed with red. Arthur drank a second cup of tea, took his shower, put on his best robes, and re-joined Molly in the kitchen. He cast a Shrinking Charm on the presents they were giving to various family members, put them in a festive sack, and set it down by the fireplace next to the basket containing Molly's Christmas pudding. They were both ready to go by Floo to Potter's Pride to join the family to celebrate Christmas but they still had time to remember past years. Arthur reached up to the top shelf of the bookcase and got down a very special book. He put it on the kitchen table and he and Molly sat with chairs close together while they turned the pages and remembered the many Christmases they had spent together.
Even before they married, Arthur knew that Molly really loved Christmas. It wasn't that she was particularly religious, most witches aren't; but she did love everything about Christmas. For their first Christmas as a married couple, when they were still living in Diagon Alley in a flat above Berte's Better Bakery, Arthur gave Molly a book called Christmas Memories. The first section was about various Christmas traditions but most of the pages were left blank. They were for writing about each Christmas along with space for a yearly picture. Since it was a magical book, a new page appeared as needed.
Molly was so excited about her book for recording memories of each Christmas that she showed it to everyone at the early dinner they ate with Arthur's parents and again at the evening meal they ate with the Prewett clan. Her mother's twin sister, Auntie Muriel, was at the second dinner and went on and on about Christmas Crackers and the meaning of the objects in the Christmas pudding. Auntie Muriel's daughter, Molly's cousin Holly, got the tiny pink baby in her Christmas pudding. That meant that she would be a mother before the next Christmas. The first entry Molly wrote on the page titled Christmas 1968 was "Arthur gave me this book for our Christmas memories. I will write in it every year. I gave Arthur a Muggle flashlight. He said it was almost as good as a Lumos spell. We ate Christmas dinner with Arthur's parents and his brother Charlie. Then we went to Mum and Dad's for another dinner. Auntie Muriel and her daughters were there. Holly got the baby in the Christmas pudding. I am sure she will get pregnant. We decided that do not want to eat two big dinners next Christmas." The first picture she put in the book was of them kissing under a sprig of mistletoe in front of the Prewett Christmas tree.
Molly always giggled a bit as she remembered their second Christmas. She and Arthur avoided deciding which family they would eat with and went on holiday all by themselves at the seashore. They decorated a tiny tree for the table in their room and hung stockings on the hotel room's bedposts. She filled his with small presents that she knew he'd like and he did the same for hers. It was delightful to drag the stockings back into bed to open them. They had their pictures taken in a booth near the sea before they walked along the beach picking up shells. When a storm came up, they ran back to the hotel and spent the rest of their two-day holiday in bed. Molly wrote "Arthur and I went to Brighton and stayed in a hotel. It was like a second honeymoon. We had a tiny tree and filled each other's stockings. We got silly pictures taken in a booth and found shells for a while before it rained and we had to stay inside." She put the whole strip of pictures of them grinning like clowns in the Christmas book.
Billy was born four weeks before their third Christmas in 1970. It had been an easy birth and he was a calm baby. Mary Prewett was with Molly during the delivery and came through the Floo in the bakery every morning for two weeks to help with her first grandson and to cook and to clean. Before the birth, Molly knitted a red and green striped stocking for each of them. She cried for joy on Christmas Eve when she saw Baby Billy's little stocking hanging between her medium one and Arthur's big one. Each of them bought small gifts for each other and their new son. Baby Billy had his first Floo experience when they took him and his basket and all the other items that new babies require to dinner at the Prewett's. Molly nursed him just before dinner and he slept peacefully all through it and the present opening. Molly, Arthur, and Billy had their picture taking wearing hand knitted jumpers she had made as a surprise while Arthur was at work. They were red and green striped like the stockings. The notes Molly wrote that year were "This is Billy's first Christmas. He is so tiny he'd fit in the red and green stocking I knitted for Arthur. I made jumpers to match for all of us. I am going to knit one for Billy every Christmas. Mum has decided that she wants Billy to call her Granny. I can't wait until Billy can enjoy the Magic of Christmas." She loved the picture of the three of them dressed alike in front of the Prewett's big tree and cast a Sticking Spell to keep it in the book.
The Weasley family had moved to the Burrow by the next Christmas and little Billy was a menace anywhere near the Christmas tree. He could not resist pulling decorations off it and chewing on packages so Arthur cast a Barrier spell around it. Little Billy had outgrown the red and green striped jumper he wore as a newborn so Molly put it on his new teddy bear. Molly and Arthur put together a Muggle little red wagon while they waited for Father Christmas and listened to Celestina Warbeck's Live Christmas Eve Special. Molly made a fantastic dinner for Arthur's parents and her mother and father and brothers. Bill loved Uncle Fabian and Uncle Gideon even more when they gave him a Toddler Broom that hovered just two feet off the ground. Molly wrote, "Billy was excited about everything this Christmas. Nana and Papa Weasley and Granny and Grandpa Prewett and the boys came for Christmas dinner at the Burrow. Everyone thinks I have done a great job fixing it up. Fabian and Gideon gave Billy a Toddler Broom. He only fell off six times and laughed and got back on each time. I think he liked it better than the wagon we gave him but I will like pulling him in it instead of always having to carry him." The picture for 1971 showed Billy sitting in his new wagon wearing the new sky blue Christmas jumper that matched his eyes.
Charlie was only two weeks old on Christmas in 1972. Molly's mother, Mary Prewett, was still staying with them. She had been helping with Billy and doing all the cooking, washing, and cleaning so Molly could get back on her feet from having an eleven-pound baby. Charlie nursed with great vigor and slept for four hours at a time. Billy's Christmas jumper was blue with a yellow B on the front of it. Molly had made a tiny yellow one for the baby but had not yet put an initial on it. She and Arthur had agreed to name him after Arthur's brother if he were a boy. Molly had been singing "a boy for you and a girl for me" for the month before Charlie's birth because she was hoping for her Guinevere this time but she loved her strong second son. The Prewett men joined them for Christmas dinner and Molly's mother returned home with them that night. Molly's notes in her Christmas book that year were "Charlie is a good baby but so different from Billy. He will eat anytime! Billy and I made cookies for Father Christmas. Grandpa and the boys came to pick up Granny and took her home after dinner. I am going to miss her taking care of everything but they need her at home, too. Billy did his first magic. He actually Summoned a candy cane from the mantle when I put it up there so he wouldn't spoil his dinner. Fabian and Gideon say it is the earliest they have ever seen someone doing magic." Molly loved the picture that showed her twin brothers holding their nephews in their new jumpers that Christmas.
As Molly and Arthur leafed through the book that Molly had written in every Christmas, each new page reminded them of how quickly the time had gone.
The three years when Bill and Charlie were their only children were happy ones but extremely busy. Molly barely had time to write short notes each year. Christmas 1973 was- "Arthur took us for a ride in a Muggle one-horse sleigh and the boys sang learned to sing 'Jingle Bells'. They sang for Nana and Papa Weasley at dinner. Charlie can already ride on Billy's Toddler Broomso FatherChristmas brought him knee and elbow pads and a helmet. Billy got a Preschool Broom."The only thing written for 1974 was- "Arthur is so busy this year and the boys are so active. It was nice to spend some time together as we listened to Celestina Warbeck's Christmas Eve Special." Nana and Papa Weasley came early in the morning to watch the boys open their presents. They made a big mess but that's what Christmas is about. Granny and Grandpa Prewett came after lunch but didn't stay long. Arthur and I and both boys took a nap as soon as they left. It was a good Christmas." The note on the Christmas 1975 page was- "Christmas was too busy. We took the boys to see Father Christmas at the big toyshop in Diagon Alley. It was so crowded that I felt a little faint. Granny and Grandpa Prewett came over Christmas morning. Fabian and Gideon were doing something for Professor Dumbledore so they couldn't come. Our boys loved their presents. Billy loves books and Charlie loves anything that makes noises. We ate Christmas dinner all by ourselves this year. It seemed time for just our family to celebrate together. The baby was in my Christmas pudding. I will go to see Healer Carroll next week." The pictures for all three years showed Billy in a blue jumper